Have you recently bought Windows 7 Professional or Ultimate, and found that some of your applications are not compatible with Windows 7? Both Windows 7 Professional and Ultimate have the ability to run XP Mode. This lets you run older Windows XP software on your Windows 7 desktop.
Unfortunately this software does not come with your Windows 7, you will have to download it from the Microsoft website.
Download Windows XP Mode (500MB)
If you have any programs that are incompatible with Windows 7, download XP Mode and you will be able to run them in your Windows 7